compression bag 20x40cm Discontinued The double layer system is the The double layer system is the core of the design: the thinner inner belt threads through trouser loops via a G hook and attaches to the outer belt through a full length hook and loop panel airsoft rifles and lightweight platforms where every gram on the sighting line matters At 20x40 cm it suits mid weight sleeping bags and spare field clothing: a practical option when the original stuff sack is worn out or when you want a second set of bags to split the load across multiple carriers Two stage compression that progressively reduces volume without stressing down or synthetic fill